Chassis generally include a shell, supports, panel all kinds of switch and indicator. With steel plate and shell with plastic made, high hardness, mainly up to protect the internal components case the action; Stents mainly used for fixed motherboard, power and all kinds of drive.
Case there are many types. Now the market is generally AT, ATX, Micro ATX as well as the latest BTX. AT the full name of the case should be BaBy AT, mainly used to install the main board can only support AT early in the machine. ATX case is one of the most common case, most of the type of support now motherboard. Micro ATX case is in the box AT the basis of, in order to further save desktop space, thus ATX case volume than to want a little bit small. Each type of case can only be installed its support of the type of main board, general is not mix, and power also have a difference. So everyone when the choose and buy must note.
Latest BTX, is Balanced Technology Extended for short. Intel is defined and guide desktop computing platforms new rules. BTX architecture, can support the next generation of computer system design new appearance, make industry can heat management, system in size and shape, and noises to achieve the best balance.
The new architecture BTX characteristics: support Low-profile, that is narrow board design, system structure will be more compact; According to the movement of air cooling and, on the main board of the layout of the lines, the optimization design; The mainboard is simpler and more convenient installation will be, mechanical performance will also after optimization design. Basically, BTX structure is divided into three, respectively is standard BTX, Micro BTX and Pico BTX.
From size to see the whole range of BTX platform no ATX motherboard motherboard than small, so the BTX for smaller development is not a desktop computer, but more elastic circuit wiring and modular components area, is the key of BTX. BTX case ATX case than the most obvious differences, there is only in the left before the open the side of the plate, change to the right. And other I/O interface, and all the corresponding to the opposite position.
BTX case, and has great ATX internal differences, BTX case the more intriguing design key lies in the improvement of cooling, the CPU, the position of the graphics card and memory than ATX structure completely different, the position of the CPU fully has moved to the front plate case, instead of the position, this is for more effective use of the cooling equipment, in the ascension of all equipments in the heat efficiency. Therefore, BTX structure of the equipment will be to linear configurations, and on the design to reduce heat air impedance factors for the Lord; Through the case back from the front inhaled cooling air, and the internal linear collocation of the equipment, and the last in the case back out. This design is not only more to improve the internal heat efficiency, but also can reduce the heat equipment that fan speed, guarantee the case of low noise environment inside. In addition to the position transformation, outside of the installation of the motherboard, BTX standard also make a new standard, one of the most important is BTX have optional SRM (Support and Retention Module) Support protection Module, it is case bottom and a buffer between motherboard, usually use the low carbon steel, high strength to make, can fight the strong foreign force to be bent, and therefore can effectively prevent the mainboard deformation.
In addition, chassis and ultra-thin, half high, high, high and three quarters the vertical and horizontal chassis of the points. High and all the high 3/4 case has three or more than three 5.25-inch drive is installed slot and two 3.5 inch floppy disk slots. Ultra-thin case is mainly some AT case, only a 3.5 inch floppy disk slot and 2 5.25 inch drive slot. Half tall box Micro ATX and is mainly Micro BTX case, it has 2-3 5.25 inch drive slot. In the selection of best with standard vertical ATX and BTX case shall prevail, because it a large space, installed slot, expansibility, ventilated condition is good, can adapt to the needs of the majority of users.
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